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Finding the Fourth Proportional to 66,938.88, 100,419.36 and 27,485.52

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Solution

The fourth proportional to 66,938.88, 100,419.36 and 27,485.52 is: 41,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,938.88 : 100,419.36 = 27,485.52 : x
  2. Step 2: Convert to fraction form
    66,938.88/100,419.36 = 27,485.52/x
  3. Step 3: Cross multiply
    66,938.88x = 100,419.36 × 27,485.52
  4. Step 4: Simplify right side
    66,938.88x = 2,760,078,327.67
  5. Step 5: Solve for x
    x = 2,760,078,327.67/66,938.88
  6. Step 6: Final answer
    x = 41,232.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.